428683639 has 2 divisors, whose sum is σ = 428683640. Its totient is φ = 428683638.

The previous prime is 428683609. The next prime is 428683669. The reversal of 428683639 is 936386824.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (428683609) and next prime (428683669).

It is a cyclic number.

It is not a de Polignac number, because 428683639 - 2¹⁷ = 428552567 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 428683592 and 428683601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428683609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214341819 + 214341820.

It is an arithmetic number, because the mean of its divisors is an integer number (214341820).

Almost surely, 2^428683639 is an apocalyptic number.

428683639 is a deficient number, since it is larger than the sum of its proper divisors (1).

428683639 is an equidigital number, since it uses as much as digits as its factorization.

428683639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 49.

The square root of 428683639 is about 20704.6767422242. The cubic root of 428683639 is about 754.0132359826.

The spelling of 428683639 in words is "four hundred twenty-eight million, six hundred eighty-three thousand, six hundred thirty-nine".